I finished recapping the set and popped the original CRT back in. Since it had tested so poorly I wasn't surprised that the best I could get was a dim, out of focus image. I had to dim the lighting to take this photo. The brightness control has virtually no effect.
Replacing it with a good 16RP4 made a very noticeable difference!
Tweaking the controls improved the focus and brightness is most definitely much better. I do have some streaking though. I'll check the peaking coils and video amp circuit.
